Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering Class 1 ASTM A540 Grade B24 4340 Mod 1"3/8 Unc X 9"1/2 Bolts, AISI 4142 ASTM A540 B23 E-4340-H 1 1/4"-7 X 5" Threaded Bolts, M4 Titanium Furniture T Nut Four-Pronged Insert Nuts and so on.